Stephen Harper is 53 years old today. He became prime minister at age 46. (CP/Alamy)
Stephen Harper is celebrating his 53rd birthday Monday.
His wife, Laureen Harper, came by the office and presented the prime minister with a cake, according to Harper's spokesperson.
Harper was 46 when he became Canada's 22nd leader. That puts him among some of the youngest prime ministers Canada has ever elected.
Joe Clark remains the youngest ever prime minister at age 39, he's followed by Brian Mulroney at 45. Kim Campbell was the same age as Harper when she briefly became prime minister in 1993.
The oldest person ever to become prime minister was Sir Charles Tupper, who was elected at age 74 in 1896.
In honour of Harper's big day, here's a look at how old our former PMs were when they landed the top job.
Loading Slideshow
How Old Were Our Prime Ministers?
Here's a look at how old each Prime Minister was on the day he or she was sworn in.
Sir John A. Macdonald - 52
(<a href="http://en.wikipedia.org/wiki/List_of_Prime_Ministers_of_Canada" target="_hplink">Wikimedia</a>)
Sir Alexander Mackenzie - 51
(<a href="http://en.wikipedia.org/wiki/List_of_Prime_Ministers_of_Canada" target="_hplink">Wikimedia</a>)
Sir John Abbott - 70
(<a href="http://en.wikipedia.org/wiki/List_of_Prime_Ministers_of_Canada" target="_hplink">Wikimedia</a>)
Sir John Thompson - 47
(<a href="http://en.wikipedia.org/wiki/List_of_Prime_Ministers_of_Canada" target="_hplink">Wikimedia</a>)
Sir Mackenzie Bowell - 70
(<a href="http://en.wikipedia.org/wiki/List_of_Prime_Ministers_of_Canada" target="_hplink">Wikimedia</a>)
Sir Charles Tupper - 74
(<a href="http://en.wikipedia.org/wiki/List_of_Prime_Ministers_of_Canada" target="_hplink">Wikimedia</a>)
Sir Wilfrid Laurier - 54
(<a href="http://en.wikipedia.org/wiki/List_of_Prime_Ministers_of_Canada" target="_hplink">Wikimedia</a>)
Sir Robert Borden - 57
(<a href="http://en.wikipedia.org/wiki/List_of_Prime_Ministers_of_Canada" target="_hplink">Wikimedia</a>)
Arthur Meighen - 46
(<a href="http://en.wikipedia.org/wiki/List_of_Prime_Ministers_of_Canada" target="_hplink">Wikimedia</a>)
William Lyon Mackenzie King - 47
(<a href="http://en.wikipedia.org/wiki/List_of_Prime_Ministers_of_Canada" target="_hplink">Wikimedia</a>)
R. B. Bennett - 60
(<a href="http://en.wikipedia.org/wiki/List_of_Prime_Ministers_of_Canada" target="_hplink">Wikimedia</a>)
Louis St. Laurent - 66
(<a href="http://en.wikipedia.org/wiki/List_of_Prime_Ministers_of_Canada" target="_hplink">Wikimedia</a>)
John Diefenbaker - 61
(<a href="http://en.wikipedia.org/wiki/List_of_Prime_Ministers_of_Canada" target="_hplink">Wikimedia</a>)
Lester B. Pearson - 65
(<a href="http://en.wikipedia.org/wiki/List_of_Prime_Ministers_of_Canada" target="_hplink">Wikimedia</a>)
Pierre Trudeau - 48
(CP)
Joe Clark - 39
(CP)
John Turner - 55
(CP)
Brian Mulroney - 45
(CP)
Kim Campbell - 46
(CP)
Jean Chrétien - 59
(CP)
Paul Martin - 65
(CP)
Stephen Harper - 46
(CP)
Loading Slideshow
Michael Davis
Brian C
Kate MacKay
Sean M. Kelly
Lynn Orzel
Tiana McPhee
Marci
Rasta
Bernadette Wagner
Francesca Stranges
Bernadette Wagner
David Paterson
Book_Knerd©
Stephen Harper - 46 years
Paul Martin - 65
Jean Chretien - 59
Kim Campbell - 46
Brian Mulroney - 45
John Turner - 55
Joe Clark - 39
Pierre Trudeau - 48
Lester B. Pearson - 65
John Diefenbaker - 61
Louis St. Laurent - 66
R. B. Bennett - 60
William Lyon Mackenzie King - 47
Arthur Meighen - 46
Sir Robert Borden - 57
Sir Wilfrid Laurier - 54
Sir Charles Tupper - 74
Sir Mackenzie Bowell - 70
Sir John Thompson - 47
Sir John Abbott - 70
Sir Alexander Mackenzie - 51
Sir John A. Macdonald - 52
Loading comments… 
The Huffington Post Canada | By Michael Bolen Posted: 04/30/2012 3:21 pm Updated: 04/30/2012 5:24 pm